Add cargo xtask clippy (#8722)

This PR sets up a `cargo xtask clippy` command for running `cargo
clippy` with our defined set of options.

The intent is to make this easier to manage as we start enabling more
Clippy rules.

Release Notes:

- N/A

crates/storybook/Cargo.toml

@@ -11,7 +11,7 @@ path = "src/storybook.rs"
 
 [dependencies]
 anyhow.workspace = true
-clap = { version = "4.4", features = ["derive", "string"] }
+clap = { workspace = true, features = ["derive", "string"] }
 collab_ui = { workspace = true, features = ["stories"] }
 ctrlc = "3.4"
 dialoguer = { version = "0.11.0", features = ["fuzzy-select"] }